RT-XV300H - Sharp Audio Service Manual (repair manual)

rt-xv300h service manual
Model
RT-XV300H
Pages
24
Size
1.31 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
rt-xv300h.pdf
Date

Read Sharp RT-XV300H Service Manual online

RT-XV300H
SERVICE MANUAL
SHARP CORPORATION
No. S4727RTXV300H
CONTENTS
• In the interests of user-safety the set should be restored to its
original condition and only parts identical to those specified
should be used.
Page
IMPORTANT SERVICE NOTES (FOR UK ONLY) .............................................................................................................. 2
WIRING OF PRIMARILY SUPPLY LEADS (FOR UK ONLY) ............................................................................................. 2
SPECIFICATIONS ............................................................................................................................................................... 3
NAMES OF PARTS ............................................................................................................................................................. 3
DISASSEMBLY .................................................................................................................................................................... 4
ADJUSTMENT ..................................................................................................................................................................... 5
BLOCK DIAGRAM ............................................................................................................................................................... 6
SCHEMATIC DIAGRAM / WIRING SIDE OF P.W.BOARD ................................................................................................. 8
FUNCTION TABLE OF IC .................................................................................................................................................. 12
NOTES ON SCHEMATIC DIAGRAM ................................................................................................................................ 14
TYPES OF TRANSISTOR AND LED ................................................................................................................................. 14
REPLACEMENT PARTS LIST / EXPLODED VIEW
PACKING OF THE SET (FOR UK ONLY)
RT-XV300H
B
C
Dolby noise reduction manufactured under license from
Dolby Laboratories Licensing Corporation.
“DOLBY” and the double-D symbol     are trademarks of
Dolby Laboratories Licensing Corporation.
RT-XV300H
FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER
TO THE OPERATION MANUAL.
– 2 –
OUT
WITHSTANDING
VOLTAGE TESTER
SHORT-CIRCUIT
AC POWER
SUPPLY CORD
CONNECT THE PROBE
TO GND OF CHASSIS
SCREW TERMINAL
+
AC
UNIT
PROBE
IMPORTANT SERVICE NOTES (FOR UK ONLY)
Before returning the unit to the customer after completion of a
repair or adjustment it is necessary for the following withstand
voltage test to be applied to ensure the unit is safe for the
customer to use.
Setting of Withstanding Voltage Tester and set.
NG: The “NG” lamp lights and the buzzor sounds.
OK: The “GOOD” lamp lights.
Judgment
Unit
Set current (Cutoff current)
Set time
Set name
Withstanding Voltage Tester
Test voltage
Set value
4,240 VPEAK
3,000 VRMS
6 secs
4 mA
WIRING OF PRIMARILY SUPPLY LEADS (FOR UK ONLY)
Figure 2
If any one of the bands shown in Fig. 2 is removed for some
reason, be sure replace it to the original position and same
appearance as berore.
Lug Terminal
92LLUG1746A
(227)
Power PWB
Power 
Transformer
Nylon Band, 80mm
92LN-BAND1318A
AC Power Supply Cord
QACCB0003AW00
(213)
Bushing (212)
LBSHC0002AWZZ 
Blue
Brown
CORE
92LCORE1777A(230)
RT-XV300H
– 3 –
DOLBY NR
RED – STAND - BY
DOLBY B•C NR
REVERSE MODE
AUTO PROGRAM SERCH SYSTEM
REC PAUSE
STEREO CASSETTE DECK   RT-XV300
B
C
AUTO REVERSE
PUSH
EJECT
1
3
4
5
6
2
7 8 9 10 11 12
13
14
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Front panel
  1. Reverse Mode Indicators:        /     /
  2. Reverse Mode Button
  3. Stand-by Indicator
  4. Dolby NR Indicators: B  /  C
  5. Dolby NR Button
  6. Cassette Compartment
  7. Fast Wind/APSS Button:
  8. Direction Indicators
  9. Reverse Play Button:
10. Stop button:
11. Forward Play Button:
12. Fast Wind/APSS Button:
13. Record/Pause Button:
14. Record/Pause Indicator
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Rear panel
15. AC Power Lead
16. From Receiver  Section Socket
16
15
NOTICE:
SEE
OPERATION
MANUAL
FROM RECEIVER
SECTION ONLY
NAMES OF PARTS
SPECIFICATIONS
Type:
Stereo cassette deck
Power source:
AC 230 V, 50 Hz
Power consumption: 8 W
Dimensions:
Width: 200 mm (7-7/8")
Height: 157 mm (6-3/16")
Depth: 283 mm (11-3/16")
Weight:
2.9 kg (6.39 lbs.)
Tape:
Compact cassette tape
Frequency response: 40 – 14,000 Hz (Normal tape)
40 – 15,000 Hz (CrO
2
 tape)
40 – 16,000 Hz (Metal tape)
Motor:
DC motor with electric governor 
×
 1
Signal/noise ratio:
Dolby NR off: 56 dB
(Metal tape)
Dolby B NR effect:
10 dB (at over 5 kHz)
Dolby C NR effect:
20 dB (at over 5 kHz)
Bias and erasure  system: AC
Tape speed:
4.76 cm/sec. (1-7/8 ips)
Heads:
Playback/recording 
×
 1
Erasure 
×
 1
Wow and flutter:
• For European customers
  0.13% (DIN 45 511)
 For U.K. customers
  0.07% (WRMS)
In/out put terminal:
System connection socket
(for receiver)
Specifications for this model are subject to change without
prior notice.
RT-XV300H
– 4 –
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling
the unit and reassembling it, to keep it safe and ensure
excellent performance:
1. Take cassette tape  out of the unit.
2. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit and remove
the batteries from the unit.
3. Take off nylon bands or wire holders where they need
be removed when disassembling the unit. After servicing
the unit, be sure to rearrange the leads where they were
before disassembling.
4. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
STEP
REMOVAL
PROCEDURE
FIGURE
1
Top Cabinet
1. Screw ................... (A1)x5
4-1
2
Rear Panel
1. Screw ................... (B1)x5
4-2
3
Front Panel
1. Socket .................. (C1)x3
4-3
2. Flat wire ............... (C2)x3
3. Screw ................... (C3)x7
4
Main PWB
1. Flat wire ............... (D1)x1
4-4
2. Screw ................... (D2)x4
5
Tape Mechanism 1. Open the cassette holder.
4-5
2. Screw ................... (E1)x4
6
Switch A PWB
1. Screw ................... (F1)x5
4-5
7
Switch B PWB
1. Screw .................. (G1)x4
4-5
8
Switch C PWB
1. Screw ................... (H1)x3
4-5
Figure 4-5
Figure 4-2
Figure 4-1
(A1)x2
ø3x8mm
(A1)x1
ø3x8mm
(A1)x2
ø3x8mm
Top Cabinet
Front Panel
Rear Panel
(B1)x5
ø3x8mm
Front Panel
Rear Panel
Main Chassis
(H1)x3
ø2.6x10mm
(G1)x4
ø2.6x10mm
(F1)x5
ø2.6x10mm
(E1)x4
ø3x10mm
Front Panel
Cassette
Holder
Tape Mechanism
Switch C PWB
Switch A PWB
Switch B PWB
Open
Figure 4-4
(D2)x4
ø3x8mm
Main PWB
Power 
PWB
Main Chassis
(D1)x1
Figure 4-3
(C3)x2
ø3x8mm
(C2)x1
(C3)x2
ø3x8mm
(C3)x2
ø3x8mm
(C3)x1
ø3x8mm
Front Panel
Tape 
Mechanism
Main Chassis
(C2)x1
(C1)x1
(C1)x1
(C1)x1
(C2)x1
Pull
Pull
Page of 24
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Download Sharp RT-XV300H Service Manual (Repair Manual)

Here you can read online and download Sharp RT-XV300H Service Manual in PDF. RT-XV300H service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp RT-XV300H System. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.